161245022 has 4 divisors (see below), whose sum is σ = 241867536. Its totient is φ = 80622510.

The previous prime is 161245009. The next prime is 161245067. The reversal of 161245022 is 220542161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×161245022³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40311254 + ... + 40311257.

It is an arithmetic number, because the mean of its divisors is an integer number (60466884).

Almost surely, 2^161245022 is an apocalyptic number.

161245022 is a deficient number, since it is larger than the sum of its proper divisors (80622514).

161245022 is an equidigital number, since it uses as much as digits as its factorization.

161245022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80622513.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 161245022 is about 12698.2290891289. The cubic root of 161245022 is about 544.2880156484.

Adding to 161245022 its reverse (220542161), we get a palindrome (381787183).

The spelling of 161245022 in words is "one hundred sixty-one million, two hundred forty-five thousand, twenty-two".